1.

The nth term of AP is 3n+ 1 and the sum to the n terms is​

Answer»

ong>Answer:

3p+1

Step-by-step EXPLANATION:

Tn=(3n-1)

SN= SIGMA Tn = sigma (3n-1)

Sn= 3.sigma n - sigma(1)

Sn= 3.{n.(n+1)/2} - n

Sn= {3.n.(n+1)- 2n}/2. = n/2.(3n+1).

Putting n=p

Sp=p/2.(3p+1). . Answer



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